IV 



CONTENTS. 



VASCULAR DISEASES. 



Page. 



Wilt of Cucurbits : 209 



Definition 209 



Host-plants 209 



Geographical Distribution 209 



Signs of the Disease 211 



Etiology 212 



Field, Hot-house and Laboratory Notes. ... 217 



Effect of Water on Wilt 284 



Varieties Attacked 284 



Morbid Anatomy 285 



The Parasite — Bacillus tracheiphilus 286 



Resume of Salient Characters 294 



Treatment 295 



Pecuniary Losses 297 



History 298 



Literature 299 



Black Rot of Cruciferous Plants 300 



Definition 300 



Host-plants 300 



Geographical Distribution 300 



Signs of the Disease 301 



Etiology 304 



Morbid Anatomy 314 



The Parasite — Bacterium campestre 316 



Resume of Salient Characters 327 



Page. 



Black Rot of Cruciferous Plants — Continued. 



Treatment 328 



Pecuniary Losses 33° 



History 331 



Literature 333 



Yellow Disease of Hyacinths 335 



Definition 335 



Host-plants 335 



Geographical Distribution 335 



Signs of the Disease 335 



Etiology 336 



Varietal Resistance 337 



Table Showing Sensitive and Resistant Varie- 

 ties 339 



List of Hyacinth Varieties which have 

 entirely or nearly Disappeared in 



Consequence of the Yellow Disease.. 341 



Morbid Anatomy 342 



The Parasite — Bacterium hyacinthi 344 



Resume of Salient Characters 350 



Treatment 351 



Pecuniary Losses 352 



History 352 



Literature 353 



ERRATA. 



Page 8 line 20 read only. 



" 33 " I " Metcalf. 



" 56 " 4 " 1897. 

 Plate 3 last line read See plate 4. 



